Ethanol oxidation on the ternary Pt-Rh-SnO2/C electrocatalysts with varied Pt:Rh:Sn ratios

被引：184
|
作者：
Li, M. [1 ]
Kowal, A. [1 ]
Sasaki, K. [1 ]
Marinkovic, N. [2 ]
Su, D. [3 ]
Korach, E. [4 ]
Liu, P. [1 ]
Adzic, R. R. [1 ]
机构：
[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
[2] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA
[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA
[4] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA
来源：
ELECTROCHIMICA ACTA | 2010年 / 55卷 / 14期
关键词：
Ethanol electrooxidation; Ternary-electrocatalysts; Pt-Rh-SnO2; Electrocatalysis; TIME FTIR SPECTROSCOPY; ELECTROOXIDATION PATHWAYS; RECENT PROGRESS; FUEL-CELLS; PLATINUM; ADSORPTION; PT(111); CATALYSTS; ACETALDEHYDE; ALCOHOLS;
D O I：
10.1016/j.electacta.2009.12.071
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ternary Pt-Rh-SnO2/C electrocatalysts with the atomic ratio Pt:Rh:Sn =3:1:x, where x varies from 2 to 6, were synthesized using the modified polyol method followed by thermal treatment. Several techniques used to characterize these electrocatalysts showed they were composed of homogeneous PtRh alloy and SnO2, having all three constituents coexisting in single nanoparticles with the average particle size around 1.4 nm and a narrow size distribution. While all the electrocatalysts investigated exhibited high catalytic activity for ethanol oxidation, the most active one had the composition with the Pt:Rh:Sn =3:1:4 atomic ratio. These ternary-electrocatalysts effectively split the C-C bond in ethanol at room temperature in acidic solutions, which is verified using the in situ IRRAS technique. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4331 / 4338
页数：8
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